"… over fifty … However, their experience in the air gives them an edge in situational awareness. …
People, please be honest with yourselves and recognize that a 60 year old physically and assuming all else equal (education...etc.), is not as sharp or strong as a 25 year old."

Your reasoning reads to be a bit contradictory.
Face it you don't need to be as physically fit as a 25 year old (assuming a fit 25 yo) to fly today's 121 aircraft.
As a passenger I would much rather have a pilot, Captain, with better SA and fit for his/her age than a strong 25 year old pilot.

Fly Safe. I do.